Thill-coupling



(No Model.)

D. D. WHITNEY.

THILL COUPLING.

Patented Nov, 12, 1889.

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UNITED STATES PATENT OFFICE.

DANIEL D. \VHITNEY, OF CORNXVALL, NE\V YORK, ASSIGNOR TO THE \VHIT- NEY COUPLING COMPANY, OF \VI'IITINSVILLE, MASSACHUSETTS.

THlLL-COUPLING.

SPECIFICATION forming part of Letters Patent No. 415,180, dated November 12, 1889.

Application filed August 20, 1889. Serial No. 321,413. (No model.)

To all whom it may concern: cross-bar c, and a cross-bar (1, having suitable Be it known that I, DANIEL D. VHITNEY, holes through it, is placed upon the screwof Cornwall, county of Orange, State of New threaded ends of the strap 1), and nuts d are v York, have invented an Improvement in thereafter turned upon said screw-threaded 5 Thin-Couplings, of which the following deends to securely clamp the coupling to the 55 scription, in connection with the accompanycross-bar or axle. The yoke having the ears ing drawings, is a specification, like letters on a a and the strap 1) having the screw-threadthe drawings representing like parts. ed ends I) are herein shown as made of a sin- This invention has for its object to imgle piece of metal.

prove the construction of thill-couplings, As represented in Figs. 1 and 2, aholder or 60 whereby a strong, durable, an d efficient coupframe is employed, comprising the bottom porling is produced, rattling is prevented, strain tion a side portions c and the back portion 6'', on the bolt lessened, and wear may be readily extended upward between the hub a and the taken up. yoke, the said back portion terminating in a In accordance with this invention the thill screw-threaded projection e". The bottom 6 5 is pivoted by means of a bolt to ayoke which portion 6 sides a, and back a constitute a 'is provided with a clip or strap which embox-like structure for holding a yielding braces the cross bar or axle, and which is secushion e and a bearing-block e. The yieldcured thereto in any usual or suitable maning cushion c is made of rubber and the bearnor. A holder or frame is provided, whichis ing-block of metal. The bearing-block has secured to the coupling by a nut or equivaon its under side a lip e, which assists in lent, said holder or frame receiving a conholding the yielding cushion in place. caved block in the concavity of which the The holder or frame is held in position by hub of the thill rests. The concaved block means of across-bar 6 having a hole through 25 herein preferred consists of two partsviz., a it to receive the shank of the screw-threaded bearing-block, which is provided 011 its conportion a, and extended laterally to bear. caved face with anti-friction material, as upon the ears or lugs a a of the yoke, graphite, and in the concavity of which the and a nut e is turned upon said screwhub of the thill rests to thereby wear or move threaded portion c. As a lock for the nut I 30 on the anti-friction or graphite bearing-surhave herein shown the crossbar c as recessed 8o face, and a yielding cushion upon which the or concaved to receive aconvexed or projectbearing-block restsyet the block may be ing side or face of the nut 6 (see Fig. 2,) so made'in one piece of yielding or elastic mathat as the nut is turned the projecting porterial. The said block is pressed into contion or portions thereof will pass over the 3 5 tact with the hub of the thill more or less, as projecting portions of the cross-bar, the cushdesired, by adjusting its holder or frame. ion 6 yielding to permit such movement, and

Figure 1 shows in longitudinal section and the said projections will thereafter enter the partial elevation a thill-coupling embodying recess in the cross-bar. This form of lockthis invention; Fig. 2, a right-hand end view not will not readily be displaced. The upper 40 of the thill-coupling shown in Fig. 1, and Fig. face of the bearing-block is concaved, and is 3 a modification to be referred to. also recessed to receive anti-friction material,

The thill a, or plate attached to the thill as graphite, so that the hub a of the thill proper, has a hub to, through which passes a may come in direct contact with said matebolt a serving as a pivot for the thill, said rial.

5 bolt also passing through ears (fia of ayoke, The bearing-block e and yielding cushion to the back or crown of which is attached a may be made in one piece, of yielding mateclip or strap 1), which passes over and emrial, as represented in Fig. 3, and still avery braces the cross bar or axle c. The clip or efficient and durable thill-coupling produced. strap Z) has screw-threaded ends Z) project- It will be seen that the holder or frame may 50 ing downward below the under side of the be raised and lowered by turning the nut 6 I0 and thereby increasing or decreasing the friction between the hub and block, said adjustment also compensating for Wear. By this form of coupling the thill may be held in any position desired, and when moved on its pivot will move under Whatever degree of tension it may be subjected to by the turning of the nut'e By means of the holder or frame, the block carried by it, and the cross bar and nut the block is raised vertically against a fixed point, as the lugs or cars serve as apurchase or seat for the crossbar, so that the only adjustment or movement of the block is vertical; and as the object to be raised is at one side of the seat or purchase the tendency is to draw the hub toward the axle, and thereby lessen the strain on the bolt.

I claim 1. A thill-coupling comprising as-a co-op- .erative part of it a bearing-block, as e, having a concave upper surface, and a lip 6 formed 011 its under side, a yielding cushion 6 upon which the said block rests, and which is retained in place by the lip e, a verticallyadjustable holder or frame for the block and cushion, having a base 6 side portions e and the upwardly-extended back portion c and means for vertically adjusting the said holder with. relation to the yoke, substantially as described.

2. In a thill-coupling comprising a yoke to which the thill is attached and means for attaching said yoke to the cross-bar or axle, the

combination, with the hub a of the thill, of

the bearing-block 6, having on its surface anti-friction material, a yielding cushion for said bearing-block, the cross-bar 6 having an opening therein, and a holder or frame provided with an upwardly-extended back portion 6 having a screw-threaded shank, and

adapted to enter the opening in said cross-' bar and be retained therein by a suitable nut on lts shank, substantially as described.

3. In a thill-coupling, the yoke to which the thill is pivoted and means for attaching said yoke to the cross-bar or axle, combined with the concaved metallic bearing-block for the hub of the thill, the concaved or contacting surface of which is provided with antifriction material, a yielding cushion, on Which the said bearing-block rests, and a holder or frame containing said bearing-block and cushion and made vertically adjustable with relation to the yoke, substantially as described.

4. In a thill-coupling, the yoke to which the thill is attached and means, substantially as described, for attaching said yoke to the cross-bar or axle, combined with the bearingblock for the thill, the yielding cushion 6 the holder or frame, the cross-bar e recessed as described, and the lock-nut 6 having a projection to enter said recess in the crossbar e substantially as and for the purpose set forth.

5. In a thill-coupling, the yoke to which the thill is attached and means, substantially as described, for attaching said yoke to the crossbar or axle, combined with a holder or frame consisting of a base part located below the hub of the thill, and a shank rising vertically between the hub of the thill and yoke, a block carried by said holder or frame, the cross-bar c and a nut turned on the shank of the holder, substantially as described.

6. In a thill-coupling, the yoke to which. the thill is attached and means, substantially as described, for attaching said yoke to the crossbar or axle, combined with a holder or frame, a block carried by it adapted to be pressed in contact with the hub of the thill, a crossbar bearing on the yoke through Which the shank of the said holder or frame passes, and a nut or equivalent for the said holder or frame, substantially as described.

7. In a thill coupling, the yoke to which the thill is attached and means, substantially as described, for attaching said yoke to the crossbar or axle, combined with a block forthe thill, a holder or frame for the block, a crossbar bearing on the yoke through which the shank of the holder or frame passes, and a lock-nut, the said cross-bar and lock-nut having one a recess and the other a projection to enter the recess, substantially as and for the purposes set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DANIEL D. IVHITNEY.

Vitnesses:

JOHN MILLER, L. T. SCHULTZ. 

